Lighting and ignition switch



Feb. 22 1927.

E. A. BOHLMAN LIGHTING AND IGNITION SWITCH -ets-Sheet 1 Filed March 11. 1925 ZZZ/52270. 1" frneflfifiaizimfin Feb. 22 1927.

E. A. BOHLMAN LIGHTING AND IGNITION SWITCH Filed March 11. 1925 2 Sheets-Shoat 2 2 7 azvze Patented Feb. 22, 1927.

Write; stares ATE T- ERN ST. 1A., BQHLMA E IQA ILLINOIS, I N B '1 KEL GG S IT HB B AND surrey COMPANY, or CHICAGO, ILLINOIS, A oonreaamxonor rumors;

LIGHTING AND IGNITION sw ron.

Application filed March 11, 1925. Serial 1\To. 14,617.

' My invention relates to electrical switches in general and has to do more particularly with switches i orcontrolling a plurality of ciicin'ts, andthe present embodimentof my invention is for use in connection with igni tion and lighting circuits for automobiles or the like. i

' An object of my invention is to produce an improved device of the class described, that embodies desirable features and advantages, allina simple and eliicient manner.

A feature of my invention is the provision of novel means for associating the actuating levers of the"lighting and ignition units of the'switclr with the rotor elements ofthe lighting and ignition units, andsecuring the parts, which comprise the rot-orelements that formrotat'able units, together without the otcomplicated fastening means, such as nuts and threaded members.

Another feature ofmy invention is the provision of'a novel method of holding the rotor elements of the lighting and ignition units in their different operative positions, and the means for producing a snap action of the rotor elementsas they are moved to their-different operative positions.

Another feature of my invention is the provisionof' a'novel contact arrangement, supported in the 'base of the ignition and lightingswit'ch, which cooperates with'the wipers ofthe' respective rotor elements, which elements-when rotated cause said wipers, associated with the rotor elements, to engage thestationarycontacts engaged in the base of the switch. 7

Still another feature of my invention is the provision of a simplified horn button mounted in association with the lighting and ignition units, and also the method I use to secure the switch to'the dash of the car. i-still further feature of my invention is the provision oi means for carrying the fuses used in the circuits oi which the'switch is u p rt The above features, as well as others, will be mere fully hereinafter described, and for a complete understanding of my invention reterence'may be hadto the accompanying drawings in which like reference characters, in the diiterent views, denote l ke parts, and

in which V operative.

switch of my invention;

Fig. 2 is a right-side elevation of Fig. 1; Fig. 3 isa rear view of Fig.1," i Fig. 4 is an interior rear view ofthe mechanism with the base removed; i

Fig. 5' is a sectional viewalong the line 55 of'Figt; .Fig. 6 is a face view of the base, illustrating the contact arrangementof the ignition and lighting'unitsofthe switch; i

Fig. 7 is a'view of the interior mechanism,

Fig. l is a face view of the combination part of the apparatus being removed to more clearly show themetlrod and means ofhold- 'ing thelightingand ignition switch units in any of their operativepositions;

Fig. 8 is a sectional View of the actuation lever of one ofthe switch u nitsand" its as certain lampson the automobile. The igni-' tion switch unit M'has a normal or off position E, in which position the ignition apparatus rendered inoperativ and an operative position F. Then the switch un'it'M is moved to its operative position F, the ignition circuit is closed and thus rendered I will describe, more in detail, the switch of 1ny,i'1'1vention[ First, I will describe the back structure which preferably comprises a fiatcircularmountmg disk, or base 2, made of any suitable insulating material, such as fibre or bakelitef A' numberofsuitablecontact members 3;, gt, 5, 6' T, S, '9", 10, 11 and 12"are provided-and are secured in suitable slots 1 3"provided in the base 2. "Contact membersS, if and 5" are associated with the ignition unit. and contacts 6",j7:",' 8, 9', 1 0, 11" and. associated with'the light= contacts 8' and 9.

ing switch unit L. As each one of the coin tact members is secured to the base 2 in the same manner, a description oi one. which is typical of the others, will snflice to give a clear understanding of the method used. In reference to Fig. 10, assume that the contact member shown is the contact member 5. 1t is stamped out of suitable conducting material, such as brass. The base 2, which carries these contact members, is provided with a slot 13 of a size to receive the reduced portion of the contact member 5. The reduced portion ti lis inserted in its respective slot l3.with the shoulders 1st and 1st, formed by the reduced portion 5- when the member 5 is in position in the slot 13 resting against the face2 ot the base The reduced portion 5 protrudes slightly beyond the face of the base 2 and by means of a suitable tool, this protruding portion is shaped by means of a swaging operation. The edges 5 and 5 are swaged to secure the member 5', in its slot 13 against movement and the interinedb ate portion is formed to present an arcuale portion 5 which forms the contact 5' adapted to be engaged by the wipers V and V associated with the contacts as will be more fully described hereinafter. The terminals 3 and 5, which extend up from tl c face 2 of the base 2, of which the contacts 3 and 5 are a portion, are provided to permit the connection of external conductors for which I provide a suitable tapped orifice and a screw 15 which has a screw threaded engagement with the tapped orifice 15, and holds a clip 15 which is suitable to secure the external conductors to the terminal members o and 5. A terminal 16 secured to the base 2, in a manner as already described, is provided with an integrally formed laterally extending portion 16' which is provided with a depending member st which tits in a slot 13, and its protruding portion is shaped, as already described, to form the contact l. The terminal to is connected with the contact 1 by this laterally extendingportion 16 which connects the contact l associated with the ignition switch unit M to this terminal .16 which the battery terminal as will be more fully described hereinafter.

The terminals 6, 7 and 1.0, which are into grally [Ol'll'lQfl with tlloconlacts 6, T and lb extend up from the face 2 of the base 2 and form tern'linals to which external conductors are secured as already described. The ter minal 17 which integrally formed with the contacts 8 and 9 serves as a terminal for the is integrally formed with the contacts 11 and 12, serves as a terminal for the contacts 11' and 12'. These two terminals, 17 and 18 form connection means for the external conductors.

An enclosing casing for housing the rotor,

circuit closing elements K and K associated The terminal 18, which respectively with the lighting unit L, and the ignition unit M, comprises a plate men ber 20, provided with a dished portion 20', which is adapted to receive an escutcheon or designating plate 21, which bears the names of the different positions to which the ignition and lighting switch units M andL may be moved. A cup shaped member 22 is also provided. The bottom of which is provided with a pair of orifices, and similar orifices provided in the plate member 20 and the escutc-heon plate 21 are in alignment with each other and are adapted to receive ferrules all to secure the escutcheon plate 21 to the plate 20. The means for securing the plates 20 and casing 22 together to form a unit structure will be more fully described hereinafter.

The rotor circuit closing elements K and K, which are provided for the ignition and lighting units M and L, are adapted to be rotatably supported in the cup member 22, and as the elements K and K are of similar construction, and similarly supported, a do scription of one will sullice. The rotor element K, which is associated with the lighting switch unit L comprises a spider 25 which has integrally formed spring arms 26, 27 and 28 that have dished end portions 26, E27 and 28'. The spider 25 is also provided with a square orifice 3 1-, the side '35 of which is provided with a notch 36 and cooperates with an operating lever 37 which is associated with the rotor circuit closing element K for rotating the same. The lever 37 is 'nrovided with an integrally formed lever shaft 38 which comprises a cylindrical portion 39 that, when in position, rests in the opening of the ferrule 23 of its associated unit, The lever shaft 38 is also n'ovidcd with a square portion 40 next to the cylindrical portion 39, the said square portion 40 being of a size to permit entrance in the square orifice 3i of the disk 25. The side all of the square portion 40 of the lever shaft 3.. is provided with an integrally formed rib 42 which enters the slot 36 in the side 35 of the square orifice El i in the spider 25 and this slot 36, in association with the rib 42, permits the lever shaft 38 to be inserted only one way so that the lever 37 will be in its proper position to register with the indi-,

cations on the csmitcheon plate 21.

With the lever 2-37 and its shaft 338 in position as just described the same may now be locked in position against lateral movement and to accomplish this l provide a novel lockii'lg arrangement to prevent the lever sha'ltlS from moving laterally in the terrule 23, and the square orifice 3st in the disk 35. The portion ot' the lever shaft 38 which protrudesthrough the spider 25 is provided with a reduced cylindrical portion 43 which is provided with a pair of integrally formed lugs 44: and 45 dian'ietricall y opposite. The

l l l) tate assembly;

faces 4610f the respectivelugs .44-,and- :and45 and when in athisqaosition:the mm are "provided with ribs 47 and 48,.that1cooperate with a cup shaped {locking member 49, to secure the lever shaft 38 against lateral movement. The lockingqmember: 49 is cupsshaped in form and-has an integrally form-edfiange or rim 55. The bottom of the lockinmember 49 is provided with a central :ori-fi'ce and notchesytil and 52. in

the orifice 5O, diametrically opposite each other which cooperate with the lugs--44 and '45 on the lever shaft 38. Notches and 54, in theorifi-ce '50 in theb'otto-m ofthe cupshaped' member 49, arefat right anglesto the notches 51 and 52-and cooperate with theribs 47 and 48 on the faces 46 of. the lugs 44 and .45. Y

I willnext describe the process of assembling' the different units to make the switch of my invention. The plate 20, escutcheon 21 and enclosing cup shaped member 22 which forms the enclosing. casing supports thelevers 37 and-37 of the lighting and ignition switch units L and M and with these levers-in position as just described the casing and levers are now supported in a suitable fixture-to support the-same to facili- Now with the lever 37 of the lighting switch unit L in position the cup shaped locking. member 49 is slipped over the protruding end of' the lever shaft 38 and positioned so the notchesol and 52 will register with the lugs 44 and 45 on the lever shaft 38. The notches 51 and 52 are of a size-to permit the lugs 44 and 45 to enter and to thus permit the cup shaped locking member 49 to slip over the lugs 44 and 45'a nd permit its riin to rest against the face 56 of the spider 25, with the reduced cylindrical portion 43 of the shaft 38 extending, into the orifice 50 in the bottom of the cup shaped locking member 49. The depth ofthe wall 57 of the cup shaped locking member 49 is substantially equal to the space or distance between the face 56 of the spider 25 and the face 46 of the lugs 44 and 45 on the lever-shaft 38. lith the cup shaped locking member .49 in this position. the

same may'now be moved toi'ts lockingv position. and for this purpose I provide a suitable socket wrench, providedwith a slightly tapered orifice which is placed overthe cup.

shaped. locking member 49. Downward pressure is now applied to the socket wrench and this causes thewrench to grip the cup member 49 and astheri-nr 55 of-the cup member 49 rests against the face 56 of the disk i Zia-to be flexed against'theiri normal tension.

lhecup shaped member 49 is forced dewn until the face 58 of the cup member 49 is bel-OJW the ribs 47 and 48 on the lugs .44

is supported.

member 1 49 is -turned,- in either a clockwise or a;counterclookwise direction, a aquarteriof a revolution through the agency ofythe wrench: The quarter of a turn ofthe cup shaped locking-member 49' places-theslots and 54in the bottom of- ;the locking member 49-ini alignmentwith the ribs-47and 48 on the lugs 44 and-45.. Vhen the locking member 49 is in this position the pressure.

applied on the wrench is. releasedand the tension of-the sp 'mgfarms 26, 2'7 and 528 of the spider 25,-which were fiexedby this pressure, return to their normal position which carries the spider25 .up and-this upward movementcauses-the ribs 47,,and 48 on the lugs 44 and 45 toenterthe notches :53 and 54" in the-bottom face of the cupishaped locking. member 49. With the cup shaped lockingmember 49 in this position the lever 37 is held or locked inpositionagainst latveralmovement in'the orifice. in the ferrule 23 and orifice 34 in the spider 25-but the lever '37 and its associatedspider-25 may be rotated to its different. operative positions;v

scription.

The roton elements 5K. ancLK. withwhieh thelevers 3? and 37 are associated, are

as iszreadily apparent from the above deadaptedto be rotatedthrough the agency of a disk of. suitable material such as fibre or bakelite and upon thisthe wiper element \V The wiper member V comprises a ring shaped member. 61 provided with three angularly displaced; integrally formed tongue extensions 62' which are adapted to enter aligned orifices 63 in the disk 59 by meanswof a forcefit tosecure the same to the disk59 against displacement or movement. The ring shaped member (if is provided with radially disposed wiper arm .64, 65,- 6 6 and 6'? whichare provided W Li flared end portions 64'. 65, 66' and 6? adapted to engage the contacts 6", 7 etc, of the lighting switch unit L. T o'associate the disk 59' andits supported wiper arms 64. 65, 66 and 657 I provide a slot 68 in the disk 59 which receives the integrally formed lugs 44 and 45 on the lever shaft 38 to support the disk 59 on the lever shaft 38. The slot 68 in association with the. lugs 44 and 45 prevents movement of the disk 59 on the lever shaft '88. Vhenthe lever 37 is moved to any of its operative. positions the disk 59, being supported as just described, is rotated with the lever shaft '38 which causes the the rotor element K reaches its next position when thearms 26, 27 and 28 will, due to wiper arms 61, 65, 66 alidf67, to engage the contacts 6, 7 etc, of the lighting switch unit L in the base 2. The ignition switch unit is also provided with a disk carrying wiper arms 70, 71., 72 and 73. The disk 69. when mounted onthe lever shaft 38 in a manner similar to that just described in connection with the switch unit. L, is adapted to engage the contacts 3', 4 ctta, in the base 2.

In order to maintain the rotor elements K and K in the positions to which they may be moved I provide the spider 25, associated with the rotor K, and a spider 25' asso ciated with the rotor K and these spiders 25 and are supported on the lever shafts 38 and 38' of the respective levers 3? and 37 of the rotor elements K and K as before described. As before described the spider 25 is provided with three spring arms 26, 27 and 28 so formed and shaped as to have spring tension. The ends of these arms are provided with dished portions 26, 2T and 28 which cooperate with a plurality of orifices 290, in the base 29 of the cu member 22 to maintain the rotor element in any of its adjusted positions which is as follows: The orifices 200 in the base 29 of the cup member 22 are of a size to allow the dished portions 26, 27' and 28. of the arms 26, 27 and 28 to partially rest in said orifices 290 which are so placed that the dished portion of each spring arm is in engagement with an orifice 200 whenever the rotor element K is in any of its adjusted positions. The spring tension in the arms 26, 27 and 28 is sutlicient to maintain the dished portions of the spiders 26. 27 and 28 in the said orifices, regardless of any jars or. vibrations to which the switch may be subjected. Theretore, the rotor element K will be maintained in any of its adjusted positions but will be easily movable to any other of its adjusted positions by actuating the lever 37 which will cause the dished portions on the arms to leave the orifices 1n the base 29 of the cup member 22 and slide over the base 29 until the spring tension, drop into the orifices provided for them to produce a snap action.

To limit the degree oi rotation of the rotor clement K, when moved to its off position A and its extreme advanced position D. a toiigue 8:3 integrally formethwith the casing member 22 extends upward. The spider 25 is provided with a tongue 86 extending outward this tongue 86 engages the tongue 85 to limit the movement in that direction. To limit the movement of the rotor element K in the opposite directiona tongue 88, similar to 85, is so placed that when the rotor element K has been moved to its fully advanced or D position the tongue 86 of the spider 25, engages the tongue 88 to prevent any further ll'ltlVGlllGIlti in that direction. The tongues 90 and 91, in the base 29 of the cup member 22, and the tongue 92 oi the spider 25' perform a similar function for the rotor element K.

The plate 29 and the cup shaped enclosing member 22 are secured together by means of studs 93 in any suitable manner and these tour studs 93, which secure the casing 22 and the plate 20 together, also provide means for securing the base 2 to the enclosing member The escutcheon 21 is secured in position on the plate 20 by means of the ferrule 23 as already described to form a unit enclosing structure.

The studs 93 extend rearwardly into the casing member and the base 2 is provided with orifices 96 which are in alignment with the studs 93 and permit the studs to pass through these orifices in the base 2 and permit the base 2 to rest against the peripheral edge of the casing 22. A pair of orifices 97 and 98 in the base 2 are adapted to receive the ends of the lever shafts 38 and 38 and serve as bearings when the lever shafts are rotated. Nuts 99 which have screwthreaded engagement withthe ends, of the studs 93, which protrude through the orifices 96 in the base 2 are turned down to clamp the base 2 against the edge of the casing 22. With the base 2 clamped in this position the operating levers 37 and 37 of the rotor elements K and K, are rotatable in the bearings formed by the ferrules 23 and the orifices 97 and 98 in the base 2. j

The contacts 6, 7, etc., of the rotor element K, are now in position to be engaged by the wiper arms 64-, 65, 66 and 67 on the disk 59 supported on the lever shaft 38 of the rotor element K. The contacts 3, a, etc, of the rotor element K are in position to be engaged by the wiper arms 70, 71, 72 and 73 on the disk 60 supported on the lever shaft 38 of the rotor elements K and K when rotated to their different positions cause the wiper arms of the respective elements K and K to engage certain combinations of contacts in the base 2 to close the circuits of the different lights of an automobile and the ignition system of the engine as is well understood by one familiar with the art.

As illustrated, in Fig. 7 of the accompanying drawings I provide fuse clips 100 and 101 secured respectively to the terminals 16 and 18 by means of suitable screws which have screw threaded engagement with suitable tapped orifices 15 in the said terminals. The terminal 16, to which the fuse clip 100 is secured, is the terminal to which the external battery lead is secured and through the agency of the fuse 102, inserted in the terminals or clips 100 and 101, battery is extended to the terminal 18 of the lighting switch unit L so that battery current, which is extended to the different light circuits by v the manipulation of the switch lever 37,

passes throughthe fuse 102 for the usual protective purposes.

I also provide a horn button unit HB which comprises a cylindrical member 104 provided with integrally formed prongs 105 adapted to be inserted in suitable aligned orifices 206 inplate 20 and casing 22, and then upset so as to hold and secure the cylindrical member 10$inits proper position. The movable member 01 the horn button unit HB coi'nprises a cup shaped member 106 of a size'to fit in the inside of the cylindrical member 104. A member 107 shaped to fit upon the arcuate shaped face 108 of the member 106 extends slightly beyond the sides of said member 106' but with its end 109 tapered down until it is of a size to'just fit loosely around the outsideof the cylindrical membe1 1 04hv Suitable orifices 110 are'provided in member-e106 and 107 and are in the proper alignment toallowa reduced portion 111 of a StBIIl'llQtQbG inserted insaid orifices 110. Theprotruding portion of 111 is then riveted andserve, to support the cap 105 in association with the unit HB; The

stem 112 extends through thejmember'104' and aligned orifices in the plate 2O, and enclosing case 22. A coil spring 11 is placed aroundthestem112 and rests between the member 1O6 and the plate 20 and maintains the member 106 in its normal position A stop 113 in the form ofa' washer is secured to a reduced portion 112 lot the stem 112 and acts as a stop' for' the butt on HR in its upward movement to its normal' position under the influence of the springjll. A cup shaped member 115, made of any suitable conducting material such a s'brass is fastened to an insulati-ng disk 117 by having portions-118 of the brass" member '115 inserted into suitable orifices provided inthe disk 117 and-then upsetting these portions 118 so as to form a unit assembly of the disk 117 andthe brassmember115. The disk117 is provided with suitable central orifices through which the reduced end portion 119 of the stem is inserted and a washer 120-is then placed over the further reduced portion 119' of the stem 112 which protrudes through the orifice in the disk 1 17 and which is then spun over to maintain the washer 120, on the end of the st'em'112 and at the same time slidably' maintains the disk 117 p and its" cup shaped member 115 on the reduced end portion 119 of the stem'112. The orifice provided in the disk 117 is large enough to allow the disk 117 and its supported member 115 to slide on tliereduced' end portion 119 of the shaft 112. A coil spring 121 is placed around the reduced end portion 119 and rests' between the stop 113 and the disk 117 and'maint'ains the disk 117' in its normal position against the washer this movement causes thestem 112 and the disk 117 and brass member 115 to be moved in adownward direction as a whole until the member 115 eiiga'gesthe contacts 16 and 75, to close a circuit between contacts IG'an'd 75 mounted on the base 2. Any additional pressure'of the button 107 after the member 115 has engaged the contacts ltia'nd '7 5 will cause the stem to continue its downward movementand due to the 'fact that the member is engaging the contacts 16 and 75 this additional movement ofthe stein will cause the stop 113 to compress the spring"121-" and permit the reduced portion 119'of tl'i'es'tem 11210 slide through the'orifice in the disk 117 which supports the member 115. This movement of the stem 112 after the member 115 has engaged the contacts 16 and 75 will whole is adapted to be" mounted 'inthe cowl of the automobile and; to gain this end the cowl of the automobile is 1r ovifdedwith a suitable orifice, in which t e body of the switch rests, and a tongue ekte'nsion 123,

integrally formed with the plate 20, registers with a'not'ch in this orific'e'in the'co-wlof the automobile to prevent the switch froinltuifning aroun'd'when in theorifice' A' b'rac'l'ret 125, provided with a pair of orifices register with theistuds 93 which protrude through the base 2 of the switch and pass through the orifices providedl Nuts 126 which have screw threaded engagement-with the studs 93 clamp the bracket 125 in position" with the leg extensions 127 of the bracket engaging therearfface of the cowl to thus clamp'the switch as a whole in the cowl opening. Spring members 128 are also securedto the bottomof the bracket125 for holding additional fuses forreserve use.

1 While I have described and illustrated a' preferred embodiment of my invention it is to be understood that I do not wish to be limited to the exact structure as shown and described but aimto cover all such changes and modifications as may comewithiht'he spirit andsco'pe of the appended claims 'Having' described my invei'i'ti'oii' what I ill mounted between said plates, operating levers for said elements, a shaft for each of said levers extending through said front plate said elements and said back plate, and a lock member cooperating with a disk supported on said shaft and provided with spring arms for detachably locking said shafts against longitudinal movement and for maintaining the adjusted position of the rotor element by engaging orifices in the said front plate.

2. A device of the character described including a front )late having orifices, a base, a pair of rotatable elements mounted between said plate and base, operating levers for said elements, shafts extending through said front plate said elements and said base, a

disk having integrally formed spring arms, and "a locking member intermediate of the ends of said shafts cooperating with means including said disk and said spring arms to lock said shaft to prevent the longitudinalmovement of the same and for main taining the ad'usted position of the said rotor element y engaging orifices in the said front plate.

3. A switch of the character described including a front plate having orifices and a base, a pair ofrotatable circuitcontrolling elements supported between said plate and base, operating levers for said controlling elements supported between said plate and base, shafts extending through said front plate said controlling elements and said base, a lockin Y member cooperating with means intermediate of the ends of said shafts in cluding a disk supported on said shaft and having integrally formed spring arms for reventing longitudinal movement of said evers and for maintaining the adjusted position of the said rotatable elements by engaging orifices in the said front plate, and circuit closing members for said elements supported on said shafts.

at. A switch of the character described including a front plate having orifices and a base, a pair of rotatable circuit controlling elements supported between said plate and base, contacts in said base associated with said controller elements, operating levers for said elements, a shaft for each of said levers extending through said front plate, said rotatable elements and said base, a, lock member coimcrating with means intermediate of the ends of said shafts to preventlongitudinal movement of said shafts, said means including a disk having integrally formed spring members which engage orifices in the said front plate for maintaining said operating levers in any of their adjusted positions. i

5. In a switch of the (diameter described including a front )late and a base, a rotor clen'ient mounted between said plate and base, an operating lever for said element, a shaft for said lever extending through said front plate,vsaid rotor element and said base, a lug on said lever shaft, a cup member provided with a notch that registers with said lug, a rib on said lug, a notch in said cup which receives saidrib to lock said lever against longitudinal movement, and a spring disk supported on said shaft having integrally formed spring arms for holding said cap member in locked position.

61111 a switch of the character described including a front plate and a casing member secured thereto a base, a pair of rotatable circuit controlling elements sup ported between the bottom of said casing member and said base, a pair of shafts extending through said front plate said casing member and said base,ilocking means cooperating with means intermediate of the ends of said shafts for locking said rotatable elements against longitudinal movement and spring spiders supported on said shafts cooperating with means in the front plate for yieldingly maintaining said rotatable elements in adjustable positions.

7. A switch of the character described including a front plate having a plurality of orifices and a base, a pair of rotor elements, each having a plurality of operative positions supported between said plate and base, operating levers for said rotor elements, a spring spider associated with each rotor element, and sprin arms of said spiders en gaging said ori ices to maintain said rotor elements in any of their operative positions.

8. A switch of the character described including a front plate and a base, a pair of rotor elements each having a normal and an operative position, said rotor elements being supported between said plate and base, operating levers for said elements for moving said rotor elements to any of their operative positions, a spring spider associated with each rotor element, said front plate having a plurality of orifices associated with each rotorelement, and spring arms for said spiders engaging orifices in the front plate and associated with each rotor element to maintain said rotor elements in their normal or operative positions.

9. A switch of the character described including a front plate and a base, a pair of rotor elements supported between said plate and base, each element having a normal and an operative position, operating levers for said rotor elements, a spider associated with each rotor element, spring arms for said spiders, said front plate having a plurality Lil of orifices associated with each rotor element, said spring arms engaging orifices in the front plate of the respective. rotor elements, a group of contacts for each rotor element in said base, and wiper elements associated with each operating lever to be moved into engagement with said contact groups, said spring arms maintaining the wiper elements of said rotor elements in their adjusted positions.

10. A device ofthe character described including a plate having depressions, a ro- 'tary shaft extending through said plate, a

member having flexible arms secured to said shaft, said spring arms adapted to engage the said depressions for positioning said shaft.

11. A device of the character described including a plate, a rotary shaft extending through said plate, a member having flexible arms secured to said shaft, said spring arms adapted to cooperate with the depressions in the said plate for positioning said shaft, and means on said plate cooperating with means on one of said spring members for limiting the movement of said shaft.

12. A device of the character described including a plate having depressions, a

said depressions to maintain the said shaft in its adjusted position.

13. A device. of the character described including a plate having depressions, a shaft extending through said plate, a member secured to said shaft having spring arms with formed ends for cooperating with said depressions to maintain the said shaft in its adjusted position, contacts, and a wiper rotatable by said shaft for engagement with said contacts.

14. A device of the character described including a plate member having depressions, an operating member extending through said plate member, and a member secured to said operating member having a plurality of arms with formed ends for cooperating with the depressions in said plate for yieldingly' holding said operating member in an adjusted position.

Signed by me at Chicago, in the county of Cook and State of Illinois, this 9th day of March, 1925.

ERNEST A. BOHLMAN. 

